How to cache refinery pages

Gemfile

# Rails4 full page caching is removed and extracted as gem, details from Rails Guides:
#   Rails 4.0 has removed Action and Page caching from Action Pack. 
#   You will need to add the actionpack-action_caching gem in order to use caches_action
#   and the actionpack-page_caching to use caches_pages in your controllers.
gem 'actionpack-page_caching'

gistfile1.rb

# put in config/application.rb

config.to_prepare do
  Refinery::PagesController.module_eval do
    caches_page :show, :unless => proc {|c| c.refinery_user_signed_in? || c.flash.any? }
    caches_page :home, :unless => proc {|c| c.refinery_user_signed_in? || c.flash.any? }
  end
  Refinery::Page.module_eval do
    after_save :clear_static_caching!
    after_destroy :clear_static_caching!

    def clear_static_caching!
      Refinery::Page.all.map(&:url).map{|u|
        [(u if u.is_a?(String)), (u[:path] if u.respond_to?(:keys))].compact
      }.flatten.map{ |u| [(u.split('/').last || 'index'), 'html'].join('.')}.each do |page|
        if (static_file = Rails.root.join('public', page)).file?
          $stdout.puts "Clearing cached page #{static_file.split.last}"
          static_file.delete
        end
      end
    end
    protected :clear_static_caching!
  end
end

to simplify clear_static_caching! , you can try sth like ApplicationController.expire_page(self.url)